Re: regression in 2.6.27.45 with usb and suspend-to-disk

[Corey Wright]

On Wed, 3 Feb 2010 10:05:27 -0500 (EST)
Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:

> On Wed, 3 Feb 2010, Corey Wright wrote:
> 
> > 2.6.27.45 will only suspend-to-disk once without rebooting.  every
> > attempt to suspend-to-disk after the first attempt results in "pm_op():
> > usb_dev_freeze +0x0/0xa returns -16" and "PM: Device usb1 failed to
> > freeze: error -16".  reverting commit
> > 4fbebe26d7a5eed6c1900bf2142b68af7df38462
> > (http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.27.y.git;a=commit;h=4fbebe26d7a5eed6c1900bf2142b68af7df38462)
> > fixes the problem.
> > 
> > this problem exhibits itself on both a x86-64 desktop and i386 netbook
> > (though the reverted commit was only tested on the x86-64 desktop).  the
> > affected computers are different architectures, different distributions
> > (debian lenny vs ubuntu hardy), and different kernel configs (but
> > unchanged since 2.6.27.23), so i am fairly certain this is a regression
> > in 2.6.27.45 and not the result of an environment change.
> > 
> > i normally use the pm-hibernate command to suspend to disk, but to
> > isolate the problem i used the kernel interfaces directly (as
> > demonstrated in the transcript below).
> > 
> > i can provide any other information necessary (eg .config, dmesg, lsusb)
> > and i am willing to test patches.
> 
> Please build a kernel with CONFIG_USB_DEBUG enabled and post a dmesg 
> log showing the problem during the second hibernation attempt.

[  675.443474] PM: Syncing filesystems ... done.
[  675.576353] Freezing user space processes ... (elapsed 0.00 seconds)
done.
[  675.606968] Freezing remaining freezable tasks ... (elapsed 0.00
seconds) done.
[  675.629249] PM: Shrinking memory...  -\|done (3129 pages freed)
[  679.547522] PM: Freed 12516 kbytes in 3.90 seconds (3.20 MB/s)
[  679.565065] Suspending console(s) (use no_console_suspend to debug)
[  679.585425] uhci_hcd 0000:00:10.0: release dev 2 ep81-INT, period 8,
phase 4, 118 us
[  679.585453] hub 2-0:1.0: hub_suspend
[  679.585460] usb usb2: bus suspend
[  679.585463] usb usb2: suspend_rh
[  679.585534] hub 1-0:1.0: hub_suspend
[  679.585538] usb usb1: bus suspend
[  679.585542] ehci_hcd 0000:00:10.4: suspend root hub
[  679.585547] ehci_hcd 0000:00:10.4: suspend failed because port 8 is
resuming
[  679.585551] usb usb1: bus suspend fail, err -16
[  679.585554] hub 1-0:1.0: hub_resume
[  679.585585] hub 1-0:1.0: port 7: status 0503 change 0000
[  679.585590] hub 1-0:1.0: port 8: status 0503 change 0000
[  679.585595] pm_op(): usb_dev_freeze+0x0/0xa returns -16
[  679.585607] PM: Device usb1 failed to freeze: error -16
[  679.585696] usb usb2: usb resume
[  679.585699] usb usb2: wakeup_rh
[  679.624016] hub 2-0:1.0: hub_resume
[  679.624026] hub 2-0:1.0: port 1: status 0303 change 0000
[  679.624051] uhci_hcd 0000:00:10.0: reserve dev 2 ep81-INT, period 8,
phase 4, 118 us
[  679.722862] Restarting tasks ... <7>hub 1-0:1.0: state 7 ports 8 chg
0000 evt 0000
[  679.747221] hub 2-0:1.0: state 7 ports 2 chg 0000 evt 0000
[  679.747251] done.

corey
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